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Finding the Fourth Proportional to 72,290.52, 99,767.16 and 40,458.96

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Solution

The fourth proportional to 72,290.52, 99,767.16 and 40,458.96 is: 55,836.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,290.52 : 99,767.16 = 40,458.96 : x
  2. Step 2: Convert to fraction form
    72,290.52/99,767.16 = 40,458.96/x
  3. Step 3: Cross multiply
    72,290.52x = 99,767.16 × 40,458.96
  4. Step 4: Simplify right side
    72,290.52x = 4,036,475,535.75
  5. Step 5: Solve for x
    x = 4,036,475,535.75/72,290.52
  6. Step 6: Final answer
    x = 55,836.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.